could和may区别请求

could和may区别请求

may , might 或许，可能，可以

(might可以看作是may的过去式，这两个词除了时态不相同外，在表达意思的许多方面是相近的。当然may 和might又都有一些各自不同的独特用法。)

1)可能性

I may be busy from tomorrow on .从明天起我可能会忙起来。

You may catch sight of the sunrise from here when you get up before 5 in the morning .你在早晨五点钟以前起来，或许能从这儿看到日出。

I wondered if they might agree with the idea .我想知道他们是否会同意这种想法。

She thought it might be wise to try her luck here .

她认为在这儿碰碰运气也不错。

2)表示允许

May I come in ? 我可以进来吗？

I'd like to have a smoke here if I may .

如果可以的话我想在这儿抽一支烟。

The librarian told her that she might return the book to the library in three days .

图书馆理员告诉她说，她可以在三天后还那本书。

At the press conference , a news reporter asked the chairman if she might trouble him with a question about Taiwan issue.

在记者招待会上，一位新闻记者问大会主席她是否能提一个有关台湾问题方面的问题。

3) may间或用来表示祝愿，也常用于表示目的或让步的状语从句中:

May that day come soon .但愿这天早日到来。

May you succeed in winning the first prize in the game .

祝愿你比赛夺冠成功。

May you continue in your efforts and achieve greatersuccesses .

祝愿你继续努力并取得更大的成功。

4) might也常用于表示目的等状语从句中，或用于虚拟语气的结构中:

I could not convince him , try as I might .我无论用什么样的办法也不能说服他。

They left off earlier on that day so that they might catch the first train .

那天，他们为了赶上头班车动身早一些。

He died so that the others might live .

为了其他的人能活下去，他自己牺牲了。

If you had made better use of your time , you might have learned more .假若你将自己的时间利用得更好一些，你本可以学到更多东西的。